When to change the auxiliary belt idler?

The auxiliary belt tensioner pulley is a wearing part, just like the belt itself. It must be changed simultaneously with it, on average every 100 kilometers. A worn idler pulley can damage the auxiliary belt.

📆 When should the idler pulley of its auxiliary belt be replaced?

Le belt tensioner auxiliary roller there, as the name suggests, to ensure its proper tension. Without it, the accessory strap cannot function properly and cannot move the accessories with which it works.

Like the auxiliary belt itself, its tensioners Wear parts... The entire set of accessories, consisting of tensioners and a belt, must be changed at the same time.

The installation frequency of the optional seat belt pretensioner varies from one car model to another. Therefore, it is imperative to check the manufacturer's recommended mileage in your vehicle's service log. This can range from 60 to 120 or even 150 kilometers.

On average, you will need to replace the idler pulley and auxiliary belt. every 100 kilometers... If during another operation it is necessary to remove the accessory belt, the kit will need to be replaced: the loose belt will not be reassembled.

Failure to observe this interval could result in a sudden break in the accessory belt, which could result in engine damage. Too worn tensioners can also damage the accessory belt itself, causing damage to the accessories it controls.

👨‍🔧 How do I know when to replace the pretensioner?

Disassembly is sometimes required to gain access to the auxiliary belt and its idler roller: it is therefore difficult and, moreover, unreasonable to judge the wear of the auxiliary belt idler visually.

However, the accessory belt tensioner pulley shows visible signs of wear Replacements if necessary: ​​rust on bearings, cracked roller, etc. A worn tensioner roller will also squeal or click, and the accessory belt may even bounce.

However, it shouldn't come to this: at this stage you may already have problems with your power steering, charge battery or air conditioner... These concerns stem from a malfunctioning accessory strap that causes them all to work.

In addition, you run the risk of tearing the accessory belt or breaking the tensioner pulley, which can seriously damage your engine.

The only way to know when to replace the seat belt tensioner pulley safely is to observe the frequency specified by your manufacturer and listed in your service book.

🔍 Is it necessary to replace the auxiliary belt at the same time as the idler pulley?

Tensioner pulley and accessory belt are included in the accessory belt kit. They change simultaneously for several reasons:

• Replacing the idler roller requires give it up strap for accessoriesand you are not tightening the sagging belt.
• Tensioner pulley and auxiliary belt Wear parts.
• Idler roller wear damages the accessory strap, vice versa.

Therefore, the idler pulley should be replaced at the same time as the accessory belt, on average every 100 kilometers and at the intervals recommended by your vehicle manufacturer.

Now you know when to change the accessory belt tensioner! It must be replaced at the same time as the rest of the accessory belt kit, which includes tensioners, idler pulleys, if any, and possibly alternator pulley.